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Detonation propagation and Mach stem formation in PBXN-9

Detonation propagation and Mach stem formation in PBXN-9

Date: September 1, 1997
Creator: Hull, L.M.
Description: PBXN-9 is an explosive that is less sensitive to certain insults, yet retains a high level of performance. As a result, PBXN-9 has been considered as an interim insensitive high explosive for conventional munitions systems. Certain of these systems incorporate wave control methodologies that require some form of reactive flow representation to achieve accurate predictions of the wave propagation. The authors have continued the use of Detonation Shock Dynamics (DSD) as a means to approximately account for reactive flow effects, yet retain the efficiency necessary for the munitions design process. To use DSD, they have taken the approach to calibrate explosives by measuring the detonation velocity as a function of local wave curvature. The DSD calibration, including the appropriate boundary conditions, can then be used to predict wave propagation in complex situations such as around obstacles, following wave-wave collisions, and so on. This paper describes the DSD calibration for PBXN-9, along with the methodologies used to obtain it, for both convergent and divergent flow (positive and negative wave curvatures). During the course of the calibration for convergent flow, Mach stem formation is observed in wave reflection experiments. The characteristics of the Mach stem formation and the subsequent growth are analyzed, ...
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DETONATION PROPERTIES OF NITROMETHANE, DEUTERATED NITROMETHANE AND BROMONITROMETHANE

DETONATION PROPERTIES OF NITROMETHANE, DEUTERATED NITROMETHANE AND BROMONITROMETHANE

Date: July 1, 1999
Creator: SHEFFIELD, S. A.; DAVIS, L. L. & AL, ET
Description: No abstract prepared.
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Detonation sphere. Quarterly report, April--June, 1970

Detonation sphere. Quarterly report, April--June, 1970

Date: December 31, 1970
Creator: Sandoval, J.
Description: Evaluation of the test data from numerous experiments indicates that large scale calorimeter experimentation in the Pantex detonation sphere is impractical. Detailed quantitative and qualitative measurements of the detonation products will continue to be made to provide data for the evaluation and comparison of explosive performance.
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Detonation sphere. Quarterly report, April--June, 1971

Detonation sphere. Quarterly report, April--June, 1971

Date: December 31, 1971
Creator: Sandoval, J.
Description: The final HE test for the fiscal year was conducted in the 4-foot detonation sphere in May. A 200 g charge of 2-4-6 trinitrotoluene (1 1/2-inch diameter x 4 1/2-inch long) was initiated. On initiation, the TNT charge failed to detonate but instead partial deflagration of the HE took place. The ensuing pressure rise (54 torr vs. {approximately} 120 torr expected) implied a partial detonation; nevertheless, sampling and evaluation at the detonation products was continued. After removal of the products, the sphere was opened for inspection. The interior of the sphere was covered with a heavy carbon deposit adhering to a viscous film. Closer observation revealed granules of TNT embedded in the residual layer and also smeared on the surfaces of the involved hardware. Scrubbing with soap and water had no effect on the film; consequently, all the contamination was removed with acetone. Of the related hardware, only the copper cylinder suffered any damage. The cylinder was not fragmented; however, the internal diameter (1 1/2-inch) was found to have been enlarged by {le} 0.450 inch. The partitioned stainless steel tube suffered no distortion although the sections were propelled against the sphere wall. The data obtained for this test along with ...
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Detonation spreading in fine TATBs

Detonation spreading in fine TATBs

Date: December 31, 1998
Creator: Kennedy, J.E.; Lee, K.Y.; Spontarelli, T. & Stine, J.R.
Description: A test has been devised that permits rapid evaluation of the detonation-spreading (or corner-turning) properties of detonations in insensitive high explosives. The test utilizes a copper witness plate as the medium to capture performance data. Dent depth and shape in the copper are used as quantitative measures of the detonation output and spreading behavior. The merits of the test are that it is easy to perform with no dynamic instrumentation, and the test requires only a few grams of experimental explosive materials.
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Detonation wave profiles in HMX based explosives

Detonation wave profiles in HMX based explosives

Date: November 1, 1997
Creator: Gustavsen, R.L.; Sheffield, S.A. & Alcon, R.R.
Description: Detonation wave profiles have been measured in several HMX based plastic bonded explosives including PBX9404, PBX9501, and EDC-37, as well as two HMX powders (coarse and fine) pressed to 65% of crystal density. The powders had 120 and 10 {micro}m average grain sizes, respectively. Planar detonations were produced by impacting the explosive with projectiles launched in a 72-mm bore gas gun. Impactors, impact velocity, and explosive thickness were chosen so that the run distance to detonation was always less than half the explosive thickness. For the high density plastic bonded explosives, particle velocity wave profiles were measured at an explosive/window interface using two VISAR interferometers. PMMA windows with vapor deposited aluminum mirrors were used for all experiments. Wave profiles for the powdered explosives were measured using magnetic particle velocity gauges. Estimates of the reaction zone parameters were obtained from the profiles using Hugoniots of the explosive and window.
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Detrimental Effects of Natural Vertical Head Gradients on Chemical and Water Level Measurements in Observation Wells: Identification and Control

Detrimental Effects of Natural Vertical Head Gradients on Chemical and Water Level Measurements in Observation Wells: Identification and Control

Date: December 19, 2002
Creator: Flach, G.P.
Description: It is well known that vertical head gradients exist in natural aquifer systems, and borehole flowmeter data have shown that such gradients commonly set up spontaneous vertical flows in monitoring wells, often called ambient flows. What has not been fully appreciated until recently is the serious detrimental effects such flows can have on solute concentration and hydraulic head measurements in monitoring wells. This communication explores the possibilities of diminishing ambient flows by increasing the hydraulic resistance to vertical flow within monitoring wells and limiting the penetration of such wells. Analyzed also are the surprising effects that vertical gradients may have on the equilibrium water level in a monitoring well. Results are based on collected data, numerical flow simulations, and hydraulic analysis in the near-well vicinity.
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Detroit Arsenal COBRA run scenarios

Detroit Arsenal COBRA run scenarios

Date: December 7, 2005
Creator: unknown
Description: Army Base Studing Group, Supply and Storage Joint Cross Service Group, JCS Clearinghouse request. Original request made by BRAC Commission for MILCON data for positions that would transfer to Detroit. Includes COBRA run scenarios that would affect various installations nationwide, including Rock Island Arsenal, IL, Letterkenny, PA, and Anniston, AL.
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Detroit Arsenal Installation Familiarization Briefing

Detroit Arsenal Installation Familiarization Briefing

Date: September 13, 2005
Creator: United States. Dept. of Defense.
Description: Disregard Restriction of Header and Footer: Installation Familiarization Briefing
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Detroit Arsenal's military value score

Detroit Arsenal's military value score

Date: July 20, 2005
Creator: United States. Dept. of Defense.
Description: Department of Defense Clearinghouse Response: DoD Clearinghouse response to a letter from the BRAC Commission regarding Detroit Arsenal's military value score.
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Detroit Commuter Hydrogen Project

Detroit Commuter Hydrogen Project

Date: July 31, 2010
Creator: Brooks, Jerry & Prebo, Brendan
Description: This project was undertaken to demonstrate the viability of using hydrogen as a fuel in an internal combustion engine vehicle for use as a part of a mass transit system. The advantages of hydrogen as a fuel include renew-ability, minimal environmental impact on air quality and the environment, and potential to reduce dependence on foreign energy sources for the transportation sector. Recognizing the potential for the hydrogen fuel concept, the Southeast Michigan Congress of Governments (SEMCOG) determined to consider it in the study of a proposed regional mass transit rail system for southeast Michigan. SEMCOG wanted to evaluate the feasibility of using hydrogen fueled internal combustion engine (H2ICE) vehicles in shuttle buses to connect the Detroit Metro Airport to a proposed, nearby rail station. Shuttle buses are in current use on the airport for passenger parking and inter-terminal transport. This duty cycle is well suited to the application of hydrogen fuel at this time because of the ability to re-fuel vehicles at a single nearby facility, overcoming the challenge of restricted fuel availability in the undeveloped hydrogen fuel infrastructure. A cooperative agreement between SEMCOG and the DOE was initiated and two H2ICE buses were placed in regular passenger service on ...
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The Detroit Diesel DELTA Engine for Light Trucks and SUVs - Year 2000 Update

The Detroit Diesel DELTA Engine for Light Trucks and SUVs - Year 2000 Update

Date: June 19, 2000
Creator: Hakim, Nabil S.; Freese, Charles E. & Miller, Stanley P.
Description: Detroit Diesel Corporation (DDC) is developing the DELTA 4.0L V6 engine, specifically for the North American light truck market. This market poses unique requirements for a diesel engine, necessitating a clean sheet engine design. DELTA was developed from a clean sheet of paper, with the first engine firing just 228 days later. The process began with a Quality Function Deployment (QFD) analysis, which prioritized the development criteria. The development process integrated a co-located, fully cross-functional team. Suppliers were fully integrated and maintained on-site representation. The first demonstration vehicle moved under its own power 12 weeks after the first engine fired. It was demonstrated to the automotive press 18 days later. DELTA has repeatedly demonstrated its ability to disprove historical North American diesel perceptions and compete directly with gasoline engines. This paper outlines the Generation 0.0 development process and briefly defines the engine. A brief indication of the Generation 0.5 development status is given.
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Detroit Diesel Engine Technology for Light Duty Truck Applications - DELTA Engine Update

Detroit Diesel Engine Technology for Light Duty Truck Applications - DELTA Engine Update

Date: August 20, 2000
Creator: Freese, Charlie
Description: The early generation of the DELTA engine has been thoroughly tested and characterized in the virtual lab, during engine dynamometer testing, and on light duty trucks for personal transportation. This paper provides an up-to-date account of program findings. Further, the next generation engine design and future program plans will be briefly presented.
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DEUTERATION IN SLOW NEUTRON RADIOGRAPHY OF BIOLOGICAL MEDIA.

DEUTERATION IN SLOW NEUTRON RADIOGRAPHY OF BIOLOGICAL MEDIA.

Date: January 1, 1970
Creator: Parks, P.B.; Reichard, S.M. & Brown, M.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Deuterium and tritium experiments on TFTR

Deuterium and tritium experiments on TFTR

Date: March 1, 1995
Creator: Strachan, J.D.; Adler, H. & Barnes, C.W.
Description: Three initial campaigns to increase the fusion power in DT plasmas on the Tokamak Fusion Test Reactor [TFTR] prior to July 1994 are described. The first campaign was dedicated to obtaining >5 MW of fusion power while avoiding MHD events similar to the JET X-event. The second was aimed at producing maximum fusion power irrespective of proximity to MHD limits, and achieved 9 MW limited by a disruption. The third campaign increased the energy confinement time using lithium pellet conditioning with the hope of increasing the ratio of alpha heating to beam heating.
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Deuterium Depth Profile in Neutron-Irradiated Tungsten Exposed to Plasma

Deuterium Depth Profile in Neutron-Irradiated Tungsten Exposed to Plasma

Date: May 1, 2011
Creator: Shimada, Masashi; Cao, G.; Hatano, Y.; Oda, T.; Oya, Y.; Hara, M. et al.
Description: The effect of radiation damage has been mainly simulated using high-energy ion bombardment. The ions, however, are limited in range to only a few microns into the surface. Hence, some uncertainty remains about the increase of trapping at radiation damage produced by 14 MeV fusion neutrons, which penetrate much farther into the bulk material. With the Japan-US joint research project: Tritium, Irradiations, and Thermofluids for America and Nippon (TITAN), the tungsten samples (99.99 % pure from A.L.M.T., 6mm in diameter, 0.2mm in thickness) were irradiated to high flux neutrons at 50 C and to 0.025 dpa in the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL). Subsequently, the neutron-irradiated tungsten samples were exposed to a high-flux deuterium plasma (ion flux: 1021-1022 m-2s-1, ion fluence: 1025-1026 m-2) in the Tritium Plasma Experiment (TPE) at the Idaho National Laboratory (INL). First results of deuterium retention in neutron-irradiated tungsten exposed in TPE have been reported previously. This paper presents the latest results in our on-going work of deuterium depth profiling in neutron-irradiated tungsten via nuclear reaction analysis. The experimental data is compared with the result from non neutron-irradiated tungsten, and is analyzed with the Tritium Migration Analysis Program (TMAP) ...
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DEUTERIUM-HYDROGEN EXCHANGE IN BOEHMITE CORROSION PRODUCT FORMED ON PURE ALUMINUM IN BOILING WATER

DEUTERIUM-HYDROGEN EXCHANGE IN BOEHMITE CORROSION PRODUCT FORMED ON PURE ALUMINUM IN BOILING WATER

Date: October 31, 1961
Creator: Mori, S.; Draley, J.E. & Bernstein, R.B.
Description: Proton-deuteron exchange is rapid in boehmite corrosion product formed on pure aluminum in boiling water. In addition, deuterated boehmite films undergo rapid exchange with the humidity of the atmosphere. This explains the previously reported anomaly in the H-D exchange rate for the growing corrosion product on 1100 aluminum. (auh)
Contributing Partner: UNT Libraries Government Documents Department
Deuterium-tritium plasmas in novel regimes in the Tokamak Fusion Test Reactor

Deuterium-tritium plasmas in novel regimes in the Tokamak Fusion Test Reactor

Date: February 1, 1997
Creator: Bell, M.G.; Beer, M. & Batha, S.
Description: Experiments in the Tokamak Fusion Test Reactor (TFTR) have explored several novel regimes of improved tokamak confinement in deuterium-tritium (D-T) plasmas, including plasmas with reduced or reversed magnetic shear in the core and high-current plasmas with increased shear in the outer region (high-l{sub i}). New techniques have also been developed to enhance the confinement in these regimes by modifying the plasma-limiter interaction through in-situ deposition of lithium. In reversed-shear plasmas, transitions to enhanced confinement have been observed at plasma currents up to 2.2 MA (q{sub a} {approx} 4.3), accompanied by the formation of internal transport barriers, where large radial gradients develop in the temperature and density profiles. Experiments have been performed to elucidate the mechanism of the barrier formation and its relationship with the magnetic configuration and with the heating characteristics. The increased stability of high-current, high-l{sub i} plasmas produced by rapid expansion of the minor cross-section, coupled with improvement in the confinement by lithium deposition has enabled the achievement of high fusion power, up to 8.7 MW, with D-T neutral beam heating. The physics of fusion alpha-particle confinement has been investigated in these regimes, including the interactions of the alphas with endogenous plasma instabilities and externally applied waves in ...
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Deuterium-Tritium Simulations of the Enhanced Reversed Shear Mode in the Tokamak Fusion Test Reactor

Deuterium-Tritium Simulations of the Enhanced Reversed Shear Mode in the Tokamak Fusion Test Reactor

Date: April 1, 1997
Creator: Mikkelsen, D.R.; Manickam, J.; Scott, S.D. & Zarnstorff
Description: The potential performance, in deuterium-tritium plasmas, of a new enhanced con nement regime with reversed magnetic shear (ERS mode) is assessed. The equilibrium conditions for an ERS mode plasma are estimated by solving the plasma transport equations using the thermal and particle dif- fusivities measured in a short duration ERS mode discharge in the Tokamak Fusion Test Reactor [F. M. Levinton, et al., Phys. Rev. Letters, 75, 4417, (1995)]. The plasma performance depends strongly on Zeff and neutral beam penetration to the core. The steady state projections typically have a central electron density of {approx}2:5x10 20 m{sup -3} and nearly equal central electron and ion temperatures of {approx}10 keV. In time dependent simulations the peak fusion power, {approx} 25 MW, is twice the steady state level. Peak performance occurs during the density rise when the central ion temperature is close to the optimal value of {approx} 15 keV. The simulated pressure profiles can be stable to ideal MHD instabilities with toroidal mode number n = 1, 2, 3, 4 and {infinity} for {beta}{sub norm} up to 2.5; the simulations have {beta}{sub norm} {le} 2.1. The enhanced reversed shear mode may thus provide an opportunity to conduct alpha physics experiments in ...
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Deuterium-tritium TFTR plasmas in the high poloidal beta regime

Deuterium-tritium TFTR plasmas in the high poloidal beta regime

Date: March 1, 1995
Creator: Sabbagh, S.A.; Mauel, M.E. & Navratil, G.A.
Description: Deuterium-tritium plasmas with enhanced energy confinement and stability have been produced in the high poloidal beta, advanced tokamak regime in TFTR. Confinement enhancement H {triple_bond} {tau}{sub E}/{tau}{sub E ITER-89P} > 4 has been obtained in a limiter H-mode configuration at moderate plasma current I{sub p} = 0.85 {minus} 1.46 MA. By peaking the plasma current profile, {beta}{sub N dia} {triple_bond} 10{sup 8} < {beta}{sub t{perpendicular}} > aB{sub 0}/I{sub p} = 3 has been obtained in these plasma,s exceeding the {beta}{sub N} limit for TFTR plasmas with lower internal inductance, l{sub i}. Fusion power exceeding 6.7 MW with a fusion power gain Q{sub DT} = 0.22 has been produced with reduced alpha particle first orbit loss provided by the increased l{sub i}.
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The deuteron: a mini-review

The deuteron: a mini-review

Date: July 1, 2001
Creator: Gross, Franz & Gilman, R.
Description: We review some recent results for elastic electron deuteron scattering (deuteron form factors) and photodisintegration of the deuteron, with emphasis on the recent high energy data from Jefferson Laboratory (JLab).
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Deuteron and anti-deuteron production in CERN experiment NA44

Deuteron and anti-deuteron production in CERN experiment NA44

Date: April 1, 1995
Creator: Simon-Gillo, J.
Description: The abundances of light nuclei probe the later stages of the evolution of a system formed in a relativistic heavy-ion collision. After the system has cooled and expanded, nucleons in close proximity and moving with small relative momenta coalesce to form nuclei. Light nuclei production enables the study of several topics, including the mechanism of composite particle production, freeze-out temperature, size of the interaction region, and entropy of the system. NA44 is the only relativistic heavy-ion experiment to have both deuteron and anti-deuteron results in both pA and AA collisions and the first CERN experiment to study the physics topics addressed by d and {bar d} production.
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The Deuteron and Exotic Two-Body Bound States from Lattice QCD

The Deuteron and Exotic Two-Body Bound States from Lattice QCD

Date: September 14, 2011
Creator: Beane, S; Chang, E; Detmold, W; Lin, H W; Luu, T; Orginos, K et al.
Description: Abstract not provided
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Deuteron and helium ion irradiation of ceramic coatings on Nb--1% Zr

Deuteron and helium ion irradiation of ceramic coatings on Nb--1% Zr

Date: January 1, 1976
Creator: Rossing, T.D.; Kaminsky, M. & Das, S.K.
Description: The surface damage to insulating barium alumino-silicate glass coatings due to irradiation by 100 and 250 keV deuterons and helium ions at room temperature and at 300$sup 0$C has been studied. Blisters are observed after irradiation at room temperature with both deuterons and helium ions with energies of 100 and 250 keV. For deuteron irradiation a large fraction of the blisters have diameters which are approximately 3 to 5 times larger than the diameter observed with helium ions for identical irradiation conditions, but the density of blisters is nearly an order of magnitude lower. For irradiation at 300$sup 0$C, no blisters are observed with either type of particle. The sharp rise in permeation rate with temperature is thought to be responsible for this behavior. The blister skin thicknesses have been measured and correlated with calculated projected-range values.
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